Question
48Â Â Â Â Â Â Â Â Â Â Â Â
23              ?                78.25          269.875 (121 – 125): What should come in place of the question mark (?) in the following number series?Solution
48 `xx` 0.5 – 1 = 23 23 `xx` 1.5 – 2 = 32.5 32.5`xx` 2.5 – 3 = 78.25 78.25`xx` 3.5 – 4 = 269.875
38    40    83    254    ?     5126
Find the wrong number in the given series.
3 1.5 1.5 ? 4.5 11.25
...If 7             16      x    90       171          292
Then, 2x 2 +  1 + x ...
98    219    75    244    ?    273
Find the maximum number of trees which can be planted, 25 meters apart, on the two sides of a straight road 2125 meters long
43 36 50 29 ? 22
...6Â Â Â Â Â Â Â Â Â Â 5Â Â Â Â Â Â Â Â Â Â 40Â Â Â Â Â Â Â Â Â Â Â 32Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 249Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 240
104   106   110   113   ?   126
6 2 8 ? 84 416
...75    196    52    221    ?    250
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